I agree, it's common for school children here in Australia to bring their own water bottle, and I've kept up the habit as an adult. When I see people buying wat

I agree, it's common for school children here in Australia to bring their own water bottle, and I've kept up the habit as an adult. When I see people buying water in supermarkets it's mostly immigrants or tourists, based on overhead conversations and personal experience. I think a cultural change and education (like we did for littering, with a pretty great but not perfect outcome) is the better option. I've tried telling my foreign in-laws that the water here is some of the cleanest in the world, but they still buy their 24-pack from supermarket when they visit. Maybe one day we will convince them.